SYNCHRONOUS MACHINERY 



249 



the resistances and reactances of the sections be of the same value 



or one part of the winding will supply more current than the other. 



Fig. 228 shows a four-pole three-phase double-layer winding 



Star or Y 



I 1 I 



Delta 



i 



wo Circuit 111 



Star or Y 



Delta 



FIG. 228. Four-pole, three-phase multiple-circuit windings. 



with two slots per phase per pole connected "Y" and "A" single 

 circuit and two circuit. A winding may be connected with as 

 many circuits in multiple as there are pairs of poles. 



